As for me, I've used original Flourite in one tank, which I didn't rinse, and had to clean my filter daily for two weeks to clear, to another tank with original Flourite, which i did rinse, and had a clear tank in 3 days without cleaning media, to two tanks with Black Sand Flourite, both of which I rinsed thoroughly, and had clear tanks within days without cleaning media. In any case, good luck!

This makes me think that Flourite is less consistent than we might hope...